In order to test Sipcast you can create a 30-day account for free here.

To set up the test account simply choose a name, which is shown to the numbers you will be calling, enter your e-mail address, a valid phone or mobile phone number and create a safe password. Finally, agree on the terms of use and data protection regulations of Symonics GmbH. A Sipcast number will now be assigned to you automatically via e-mail as well as the link to the login website https://sipcast.net/.

The test period ends automatically after 30 days.

Hint:
You can set up two different Sipcast accounts and numbers via the same e-mail. By doing so, you can test the Sipcast intern immediately.